prelude 2.0S upgrades

i have a 88 prelude 2.0S its the carburated version..sohc..i dont know where i coudl get an exhaust and stuff for it..i am wanting new cams too..if you know where i could get some stuff for this engine please help me!! i am also really interested in buying a dohc fuel injected engine..jdm or american production doesnt matter to me i just wast the engine so if u cna help me please tell me thanx